51750954393521 has 2 divisors, whose sum is σ = 51750954393522. Its totient is φ = 51750954393520.

The previous prime is 51750954393503. The next prime is 51750954393623. The reversal of 51750954393521 is 12539345905715.

51750954393521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38351254879921 + 13399699513600 = 6192839^2 + 3660560^2 .

It is a cyclic number.

It is not a de Polignac number, because 51750954393521 - 2¹⁴ = 51750954377137 is a prime.

It is a super-2 number, since 2×51750954393521² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51750954390521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25875477196760 + 25875477196761.

It is an arithmetic number, because the mean of its divisors is an integer number (25875477196761).

Almost surely, 2^{51750954393521} is an apocalyptic number.

It is an amenable number.

51750954393521 is a deficient number, since it is larger than the sum of its proper divisors (1).

51750954393521 is an equidigital number, since it uses as much as digits as its factorization.

51750954393521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25515000, while the sum is 59.

The spelling of 51750954393521 in words is "fifty-one trillion, seven hundred fifty billion, nine hundred fifty-four million, three hundred ninety-three thousand, five hundred twenty-one".